Roll grinding machine



A ril 27, 1937.

A. G. BELDEN ROLL GRINDING MACHINE Filed Dec. 24, 1935 Patented Apr. 27, 1937 UNITED STATES ROLL GRINDING MACHINE Albert G. Belden, Worcester,.Mass.,, assignor to Norton Company, Worcester, .Mass;, a corporation of'Massachusetts ApplicationDecemben 24, 1935,. Serial No. 56,004:

Claims.

This invention relates to" a grinding'machine, and more particularly to'a roll grinding machine having a crowning apparatus for producing a predetermined concave or convex crown on a rollbeing ground.

One of the objects of. this-invention is to: provide asimple, thoroughly practical crowning apparatus' for a roll grinding machine for generating a'predetermine'd convexor concave crown on theroll being ground. It is a further" object" of: this invention to provide a crowning apparatus? which is readily adjustablefor varying'the extent: of crown. It is a further object of this invention to provide a roll crowning attachment in a roll grinding machine, in which it is readily adjustable for producing'either a convex or. a concave surface. Otherobjects will be inpart obvious and in. part pointed out hereinafter.

This'invention accordingly'consists in the fea-- tures of construction, combinations of elements, and arrangements of parts, as will be exemplified in the structure to be hereinafter described, and: the scope of the application of which will be indicated in the following claims.

In the accompanying drawing, in which is shown one of various possible embodiments of the mechanical features of this invention,

Fig. I is a fragmentary planview of a grinding machine embodying this invention;

Fig. 2 is a fragmentary cross sectional. view, on an enlarged scale, taken approximately "on the line 22'of Fig; 1;

Fig. 3 is a fragmentary'front elevation, orr an enlarged scale, of a table traverse mechanism; and

Fig. 4 is a fragmentary detailview; showing the connections between the rack and the table.

A roll grinding machine has been illustrated in the drawing, comprising a base l0 having; a longitudinally reciprocable work table I'l supported thereon on a pair of spaced flat ways l2 and- I3 which mate with. a pair of. narrower flat ways l4 and [50m the table H.. The'ways l-zrand l3 are of sufiicient width to" allow' theways l4 and I5 on the work table H: to slide'transversely relative to the basethrough a suffi'cient distance to take care of theextent of crown desired to'be produced on the roll being ground. The work table H isarranged to rotatably support a roll 2|) on a headstock 2| and a footstock 22.

A rotatable grinding wheel is supported on a wheel spindle 26' which in turn isrotatably supportedon'. atransversely movable wheel slide 21'. The wheel slide 21 is-arranged; to be. moved transversely relativeto thebase. Ill by asuitable wheel (Cli 51-400) feeding, mechanism which may comprise a half nut 28" depending from the wheel slide 21 and mating. with a. rotatablefeed screw 29 which is journaled in bearing: (not shown) in the base [0. The front end of the feed screw 29 is provided with agear 30 meshing with a gear 3| on the inner endof a rotatable shaft 32. front end ofthe shaft 32 carries agear 33 meshing with a gear 34 on'ashaft 35 which supports a manually operable feed wheel 36; By rotating thefee'dwheel 36, the cross feed screw 29 may be rotated to causethe grinding wheel 25 and its supporting slide 21- to'move either toward or from the roll 20 being ground.

The grindingwheel 25 and the work table H are arranged so that they may be reciprocated longitudinally relative to each other to produce the desired grinding action upon the roll being ground. In the preferred construction, the table I I is reciprocated by means of a-rackbar 4|] which is slidably supported on the base ID; A gear 4| meshes with the rack 40 which is arranged tobe dri'venby a power drivenmechanism, for examplesuch as thatshown in the prior patent to Norton No. 762,838 dated June 14; 1904'. Power is applied to rotate-a shaft 42 which serves to rotate a clutch member 43 which is arranged to engage either the clutch member or the clutch member 45. A gear 46 is? formed integral with clutch member. 45. Thebevel gears4B. and 41' mesh with a common bevel. gear 48 which is supported on a rotatable shaft49." The shaft 49 may be rotated in either direction by shifting the clutch member 43 either into engagement with the clutch member 44 or the clutch member 45. The shifting of the clutch member 43 is preferably accomplished automatically by means of adjustable dogs (not shown) on the table II which engage a reversing lever 50. The reversing lever 50 operates through a load and fire mechanism 5| to shift the clutch 43 automatically and in timed relation with the table movement to cause the table II to move in either direction.

The shaft 49'carries on its inner end a gear 53 which meshes with a gear 54 mounted on the inner" end of'a rotatable shaft 55. The front end of the shaft 55 carries a. gear 56 which meshes with a gear 51 mounted on the shaft carrying the pinion. 41. It will be readily apparent that when the gear 48 is rotated, the rotation thereof will be transmitted through the shaft 49, gear 53', gear 54, shaft 55, gear 56, gear 51, gear 4|, to reciprocate. the rack 40 relative to the base I 0.

A manually operable hand. traverse wheel 60 is provided. on. the front of the. machinebase and The.

is supported on a shaft 6| carrying a gear 62 meshing with a gear 53 supported on a shaft 64. The shaft 64 in turn supports the gears 57 and 4| so that rotation of the hand wheel may rotate the gear 4| and transmit a longitudinal movement to the rack 40.

,In order to disconnect the power mechanism when it is desired to move the table manually, a clutch member 65 is mounted on the shaft 55 and is arranged in the position of the parts illustrated in Fig. 2 to permit hand or manual traverse of the table. When it is desired to reciprocate the table automatically by power, a manually operable lever 66 is moved about its pivot 61 toward the front of the machine base to cause an endwise movement of a rod 68 toward the left, as viewed in Fig. 2, which serves to move ayoked member 69 which straddles a groove in the clutch member 85 so as to slide the clutch member endwise into engagement with a clutch member 10 which is formed integral with a gear 56, thereby connecting the gear 54 to rotate the gear 56 which in turn rotates the gear 51, the gear 4|, toreciprocate the rack bar 49 under power.

To permit the'work table II to be moved transversely as well as longitudinally on its ways, it is necessary to provide a suitable connection between the rack bar and the table during the readilyapparent from the foregoing that when the rack bar 4|] is reciprocated longitudinally, the projection Tl serves to carry the table II in a longitudinal direction and the pivot 15 serves to allow the table II to swing as it moves longitudinally and the transverse slot 18 in the rack bar 40 permits the pivot pin 15 to move transversely relative tothe rack 49 as the table II is moved through an arcuate path in generating a predetermined crown on the roll being ground.

In order that the table may be moved longitudinally and transversely through a predeter-' mined path to generate a predetermined crown on the roll being ground, a pair of forming bars 80 and 8| are'pivotally mounted on studs 82 and 83 respectively. The'studs 82 and 83 are sup-.-

ported in brackets 84 and 85 which are fixed to the base Ill. The outer ends of the forming bars 89 and 8| are supported in brackets 86 and 81. These brackets are fixedly mounted on the base l and areprovided with adjusting screws 88, 89 and 90, 9|, by means of which the bars 89 and 8| may be angularly adjusted relative to the base E0.

The forming bars 89 and 8| are connected by brackets 95 and 96 fixed to the table I and carry pivotally mounted slides 91 and 98 respectively which are shaped to fit and slide along the forming bars 80 and 8|. The slides 91 and 98 are pivotally connected tothe brackets 95 and 96 re-v spectively by studs 99 and mo. It will be readily apparent from the foregoing disclosure that, assuming the parts to be located as shown in Fig. 1, when the table H is reciprocated longitudinally relative to the base 9, the slides 9! and 98 moving along the forming bars 80 and BI cause a transverse movement of the table relative to the base l0, so that the table moves the roll 29 being ground in an arcuate path to generate a predetermined crown on the periphery of the roll. In the position of the bars as illustrated in Fig. 1, a convex crown will be produced on the roll.

If the bars 8!] and 8| are adjusted by means of the screws 88, 89, 90 and 9|, so that they are parallel with the way is, then the table M will be reciprocated in a straight path and the grinding wheel will grind a true cylinder on the periphery of the roll. If the bars 80 and 8| aread- J'usted so that their outer ends approach the way I3, then the table will be moved in a path to produce a concave crown on the roll being ground.

The operation of this machine is readily apparentfrom the foregoing disclosure. The forming bars 80 and 8| are adjusted through a desired position to generate a predetermined crown on the roll being ground. The table II is then reciprocated either manually by means of the hand wheel 60 or by power rotation of the shaft 42. The pinion 4| serves to reciprocate the rack 40 and the table II is caused to move longitudinally, as carried by the rack Q9, and transversely, as governed by the forming bars 89 and 8| to grind a predetermined crown on the roll 19. I The wheel 25 is fed toward the periphery of the roll to grind the same to the required extent.

It will thus be seen that there has been provided by this invention apparatus in which the various objects hereinabove set forth together with many thoroughly practical advantages are successfully achieved. As many possible embodiments may be made of the above invention and as many changes might be made in the embodiment above set forth, it is to be understood that all matter hereinbefore set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

I claim 1. A grinding machine comprising a base, a rotatable grinding wheel, a transversely movable slide supporting said wheel, a longitudinally movable table having a pair of parallel fiat ways thereon, a pair of spaced parallel ways on said base which are wider than the table ways to permit a longitudinal and transverse movement of said table thereon, a rotatable work support on said table, means to feed said slide either towards or from the table, means to reciprocate said table longitudinally, and means to move said table transversely during the longitudinal movement thereof to generate a predetermined crown on a work piece.

2. A. grinding machine comprising a base, a rotatable grinding wheel, a transversely movable slide supporting said wheel, a longitudinally movable table having a pair of parallel fiat ways thereon, a pair of spaced parallel ways on said base which are wider than the table ways to permit a longitudinal and transverse movement of said table thereon. a rotatable work support on said table, means to feed said grinding wheel slide transversely to grind the work piece to a predetermined size, means to reciprocate said table longitudinally on said ways, and means to move said table transversely on said ways during the longitudinal reciprocation thereof to swing the work support in an arcuate path and generate a predetermined crown on a work piece.

3. A grinding machine comprising a base, a rotatable grinding wheel, a transversely movable slide supporting said wheel, a longitudinally movable table having a pair of parallel fiat ways thereon, a pair of spaced parallel ways on said base which are wider than the table ways to permit a longitudinal and transverse movement of said table thereon, a rotatable work support on said table, means to feed said grinding wheel slide transversely to grind the work piece to a predetermined size, means to reciprocate said table longitudinally on said ways, and means including a forming bar to move said table transversely on said ways during the longitudinal reciprocation thereof to swing the work support in an arcuate path and generate a predetermined crown on a work piece.

4. A grinding machine comprising a base, a rotatable grinding wheel, a transversely movable slide supporting said wheel, a longitudinally movable table having a pair of parallel fiat ways thereon, a pair of spaced parallel ways on said base which are wider than the table ways to permit a longitudinal and transverse movement of said table thereon, a rotatable work support on said table, means to feed said grinding wheel slide transversely to grind the work piece to a predetermined size, means to reciprocate said table longitudinally on said ways, means including a forming bar to move said table transverselyon said ways during longitudinal reciprocation thereof to swing the work support in a curved path, and means to adjust said bar to generate a predetermined crown on a work piece.

5. A grinding machine comprising a base, a rotatable grinding wheel, .a transversely movable slide to support said wheel, a work supporting table which is movable longitudinally and transversely on said base, a rotatable work support on said table, means to feed the grinding wheel either toward or from the work piece to grind the same to a predetermined size, means to reciprocate said table longitudinally on the base and means including a forming bar which is arranged to move said table transversely on said base during its longitudinal movement to generate a predetermined crown on the roll being ground.

6. A grinding machine comprising a base, a rotatable grinding wheel, a transversely movable slide supporting said wheel, a longitudinally movable table having a pair of parallel fiat ways thereon, a pair of spaced parallel ways on said base which are wider than the table ways to permit a longitudinal and transverse movement of said table thereon, means including a pair of forming bars which are arranged to move said table transversely during longitudinal reciprocation thereof, and means to adjust the angular position of said bars to generate either a convex or concave crown on the periphery of said roll.

7. A grinding machine comprising a base, a rotatable grinding wheel, a transversely movable slide supporting said wheel, a longitudinally movable work supporting table having a pair of spaced flat ways thereon, a pair of spaced flat ways on said base which are wider than the ways on said table to permit a transverse movement of the table during reciprocation thereof, a rotatable work support on said table, means to reciprocate said table, and means including a pair of spaced adjustable forming bars which are operatively connected to opposite ends of said table to move said table transversely during the reciprocation thereof to generate a predetermined crown on the roll being ground.

8. A grinding machine comprising a base, a rotatable grinding wheel thereon, a transversely movable slide to support said wheel, a longitudinally movable work table supported on said base, a pair of flat ways on said table, a pair of mating fiat wayson said base which are of a greater width than the ways on said table so that the table may move transversely relative to the base, a rotatable work support on said table, means to feed said slide to move the grinding wheel either toward or from the work piece, a pair of adjustable forming bars which are operatively connected to move the opposite ends of said table transversely when the table is reciprocated to move said work piece in an arcuate path to generate a predetermined crown on the roll being ground.

9. A grinding machine comprising a base, a rotatable grinding wheel, a transversely movable slide to support said wheel, a longitudinally movable work supporting table having a pair of spaced flat ways thereon, a pair of longitudinally extending fiat ways on said base which are wider than said table ways to permit a transverse movement of said table during its longitudinal reciprocation, a rotatable work support on said table, a pair of forming bars adjustably mounted on said base, a slide on each of said forming bars, brackets fixed to each end of said table and pivotally connected to said slide, said parts being arranged so that when the table is reciprocated longitudinally, the forming bars move the ends of said table transversely to move the work piece in an arcuate path to generate a predetermined crown thereon.

10. A grinding machine comprising a base, a rotatable grinding wheel and a rotatable work support which are movable longitudinally and transversely relative to each other, means to feed one of said elements toward and from the other to grind the work piece to the desired extent, a longitudinally movable table supporting one of said elements having a pair of parallel flat ways thereon, a pair of spaced parallel Ways on said base which are wider than the table ways to permit a longitudinal and transverse movement of the table .and the elements supported thereby, means to reciprocate said table longitudinally, and means to move said table transversely during the longitudinal movement thereof to generate a predetermined crown on the work piece being ground.

ALBERT G. BELDEN. 

